Legal? use this to find out
MGA DIAG TOOL http://go.microsoft.com/fwlink/?linkid=52012
SLMGR
do you hate activation http://randelhall.blogspot.com/2010/06/activation-windows-7.html
more documentation http://www.mydigitallife.info/slmgr-commands-and-options-with-windows-vista-product-key-activation/
http://technet.microsoft.com/en-us/library/ff793433.aspx – click x for more options
What is the Balloon saying? http://technet.microsoft.com/en-us/library/ff793437.aspx
Need to activate? use SLUI.EXE